from rest_framework.views import exception_handler
from django.db import DatabaseError
from rest_framework.response import Response
from rest_framework import status
import logging

logger = logging.getLogger('django')


def custom_exception_handler(exc, context):
    """
    自定义异常处理
    exc : 异常类
    context: 抛出异常的上下文
    return :response
    """
    # 调用drf框架原生异常处理方法
    response = exception_handler(exc, context)
    if response is None:
        view = context['view']
        if isinstance(exc, DatabaseError):
            logger.error('[%s] %s' % (view, exc))
            # 数据库异常
            response = Response({'message': '服务器繁忙,请稍后再试...'}, status=status.HTTP_507_INSUFFICIENT_STORAGE)
        elif isinstance(exc, ZeroDivisionError):
            logger.error('[%s] %s' % (view, exc))
            # 0不能为除数异常
            response = Response({'message': '服务器繁忙,请稍后再试...'}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
    return response
